introducing the all-new, completely restyled subaru forester. love. it's what makes a subaru, >> stahl: at times like these, with the bombs in boston, many of us can't help but be drawn back to the horrific events of september 11, 2001. about a year from now, at ground zero in new york city, one of the largest and most ambitious memorial museums in the world is scheduled to open its doors to tell the story of that day, the national september 11 memorial museum. it'll actually be located below ground, seven stories down. it's a project that's been plagued by delays, by funding battles, even a flood thanks to hurricane sandy. but if you can believe it, those things were the easy part. the bigger challenge: how do you convey the horror of 9/11 without making it unbearable? memorialize a day most of us wish we could forget? tonight, we'll take you down below for a first in-depth look at what our nation's 9/11 museum will be. ground zero above ground is today a place of rebuilding and remembrance. at its center is a serene memorial plaza with two giant cas